Managing running programs—bg, fg, kill, killall, nice, ps,
pstree, renice, top, watch
Getting information—apropos, cal, cat, cmp, date, diff, df,
dir, dmesg, du, env, file, free, grep, head, info, last,
less, locate, ls, lsattr, man, more, pinfo, ps, pwd, stat,
strings, tac, tail, top, uname, uptime, vdir, vmstat, w, wc,
whatis, whereis, which, who, whoami
Console text editors—ed, jed, joe, mcedit, nano, red, sed, vim
Console Internet and network commands—bing, elm, ftp, host,
hostname, ifconfig, links, lynx, mail, mutt, ncftp,
netconfig, netstat, pine, ping, pump, rdate, route, scp,
sftp, ssh, tcpdump, traceroute, whois, wire-test
If you need to find full information for using the command, you can find that
information under the command’s man page.
References
https://help.ubuntu.com/community/UsingTheTerminal—The Ubuntu
community help page for using the terminal
https://help.ubuntu.com/community/LinuxFilesystemTreeOverview
—The Ubuntu community help page for and overview of the Linux file
system tree
https://help.ubuntu.com/community/RootSudo—An Ubuntu
community page explaining sudo, the philosophy behind using it by
default, and how to use it